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Support template to parse expression
Signed-off-by: Cai Zhang <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,74 @@ | ||
| package planparserv2 | ||
|
|
||
| import ( | ||
| "fmt" | ||
|
|
||
| "github.com/milvus-io/milvus-proto/go-api/v2/schemapb" | ||
| "github.com/milvus-io/milvus/internal/proto/planpb" | ||
| ) | ||
|
|
||
| func ConvertToGenericValue(templateName string, templateValue *schemapb.TemplateValue) (*planpb.GenericValue, error) { | ||
| if templateValue == nil { | ||
| return nil, fmt.Errorf("expression template variable value is nil, template name: {%s}", templateName) | ||
| } | ||
| switch templateValue.GetType() { | ||
| case schemapb.DataType_Bool: | ||
| return &planpb.GenericValue{ | ||
| Val: &planpb.GenericValue_BoolVal{ | ||
| BoolVal: templateValue.GetBoolVal(), | ||
| }, | ||
| }, nil | ||
| case schemapb.DataType_Int8, schemapb.DataType_Int16, schemapb.DataType_Int32, schemapb.DataType_Int64: | ||
| return &planpb.GenericValue{ | ||
| Val: &planpb.GenericValue_Int64Val{ | ||
| Int64Val: templateValue.GetInt64Val(), | ||
| }, | ||
| }, nil | ||
| case schemapb.DataType_Float, schemapb.DataType_Double: | ||
| return &planpb.GenericValue{ | ||
| Val: &planpb.GenericValue_FloatVal{ | ||
| FloatVal: templateValue.GetFloatVal(), | ||
| }, | ||
| }, nil | ||
| case schemapb.DataType_String, schemapb.DataType_VarChar: | ||
| return &planpb.GenericValue{ | ||
| Val: &planpb.GenericValue_StringVal{ | ||
| StringVal: templateValue.GetStringVal(), | ||
| }, | ||
| }, nil | ||
| case schemapb.DataType_Array: | ||
| elements := templateValue.GetArrayVal().GetArray() | ||
| arrayValues := make([]*planpb.GenericValue, len(elements)) | ||
| for i, element := range elements { | ||
| arrayElement, err := ConvertToGenericValue(templateName, element) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| arrayValues[i] = arrayElement | ||
| } | ||
| return &planpb.GenericValue{ | ||
| Val: &planpb.GenericValue_ArrayVal{ | ||
| ArrayVal: &planpb.Array{ | ||
| Array: arrayValues, | ||
| SameType: templateValue.GetArrayVal().GetSameType(), | ||
| ElementType: templateValue.GetArrayVal().GetElementType(), | ||
| }, | ||
| }, | ||
| }, nil | ||
| default: | ||
| return nil, fmt.Errorf("expression elements can only be scalars") | ||
|
|
||
| } | ||
| } | ||
|
|
||
| func UnmarshalExpressionValues(input map[string]*schemapb.TemplateValue) (map[string]*planpb.GenericValue, error) { | ||
| result := make(map[string]*planpb.GenericValue, len(input)) | ||
| for name, value := range input { | ||
| rv, err := ConvertToGenericValue(name, value) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| result[name] = rv | ||
| } | ||
| return result, nil | ||
| } | ||
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